Believe it or not, there are pockets of politically conservative Jews within the geographical boundaries of NYC, specifically in the "outer boroughs." They were instrumental in electing Congressman Bob Turner in a special election to fill Anthony Weiner's vacated seat last year. Unfortunately, Turner has been redistricted out of his seat for the forthcoming election.
These pockets of politically conservative Jews tend to have a disproportionate number of Orthodox Jews as well as more recently arrived Soviet (and other communist-bloc) Jews and their descendants. Those two subgroups will be voting overwhelmingly for Romney this year.
As for Bloomberg, he is a detestable big government nanny statist on a local level, but he did win the mayoralty three times running on the Republican line. In other words, he beat 'Rats. Though he is ideologically close to them in some respects, he seems to have managed to lower the level of the corruption that is inherent in openly 'rat machine-controlled city government (as in Chicago).
I wouldn't call Bloomberg a "pure communist" either, but rather a crony capitalist who is part of the obnoxious MSM.
But calling Bloomberg a "Republican" ... even a RINO, is a cruel hoax. This SOB is Che Guevara without the charm. And along the way, he has managed to almost completely undo RINO Giuliani's good work in turning NYC into (almost) a fit place for habitation by a normal human. (Even the mad dog Lefties who turned against Giuliani will begrudgingly concede that he accomplished that!)
Under Bloomberg, NYC is once again becoming a filthy mess ...a cross between Lagos and Lima... with a delightful meringue on top of Bloomberg and his Southampton pals.